Method of casting patterns and match-plates.



H. W. 'PLEISTER.

METHOD OF CASTING PATTERNS AND MATCH PLATES.

lPzutented Jan. 14, 1919.

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APPLICATION HLED MAR. 12. I918.

Patented. Jan. 14,1919.

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H. w. PLEXSTEB METHOD OF CASTING PATTERNS AND MATCH PLATES.

I APPLlCATlON H'LED MAR. 12, 1918.

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HENRY w. rEEIsrEE, or wEs'rrrErn, NEW JERSEY, nssrcnon. 1'0 HEE'EY E. NEWHALL,

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Specification of Letters Patent.

Patented Jan. Id, IFIF.

Application filed "March 12. 191E. Serial No. 221.8%.

To all whom it may concern:

Be it known that I, HENRY W. PLEISTER, a citizen of the United States, residing at IVestfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Methods of Casting Patterns and Match Plates, of which the following is a specification.

My invention relates to a method of casting patterns and a match plate.

In the accompanying drawings I have shown one form of mold, pattern and match plate, though it is of course to be understood that my invention is not to be confined to the particular forms shown.

My invention further relates to certain details of construction which will be hereinafter pointed out.

In the drawings the same reference numerals refer to the similar parts in the sev eral figures.

Figure 1 is a vertical section through a metal mold which may be used in carrying out my improved method.

Fig. 2 is a side elevation, on the line 2-2 of Fig. 1, of one-half of the metal mold, the guiding pins being shown in section.

Fig. 3 is a side elevation of the intermediate plate of the metal mold, the view being taken on the line 3, 3, of Fig. 2, looking in the direction of the arrows.

Fig. 4 is a plan view of one of the panels cast in the mold.

Fig. 5 is a side elevation of the panel shown in Fig. 4.

Fig. 6 is a horizontal section on the line 6, 6 of Fig. 5 looking in the direction of the arrows.

Fig. 7 is a plan view of the skeleton match plate showing the. panels mounted therein.

Fig. 8 is a vertical section on the line 8, 8 of Fig. 7 through the match plate and the mold, looking in the direction of the arrows.

Fig. 9 is a vertical section through the completed flask showing the mold and cope after the skeleton match plate has been removed, the flask being ready for pouring.v

Fig. 10 is a perspective view of one form of article which may be cast by my improved method, this cylinder being shownas an ex cient number of finished metal patterns to method, one or more of the patterns, in handling in the foundry, would often become damaged or broken and it is a very dificult matter, and sometimes impossible, to repair such a match plate.

By my improved method I make one metal master mold supply any number of metal plates or panels of any size. This one metal master mold is provided with all the details, lettering and so forth that may be desired to have appear in the finished casting. In the old method the metal patterns required considerable machining. It is therefore clear that by my improved method I omit all this machining, whether a plied to construction, or lettering as all these are accurately brought out on the metal pattern and correctly appear on the finished casting.

In case one of my metal patterns becomes defaced or broken in any manner, as for example, by rough handling in the foundry, it is simply necessary to remove that metal panel from the skeleton match plate, and

lace a new pattern in its place which can he done by unskilled labor and with a minimum time and efiort, there being no need to send the match plate to the factory for any repairs. Several spare metal patterns may be kept in the foundry for this very purose.

Othermadvantages of my invention will appear herein.

In the form of apparatus which I have illustrated for purpose of example, 1 1s a master metal mold formed of two parts 2 and 3 and an intermediate plate 4:. The parts 3 and 2 are provided with trunnions 5, 5 so that they may be readily handled. The metal portions of the molds 2 and 3 are formed so as to reproduce the article desired to be cast. For purposes of illustration I have shown a metal cylinder 6, Fig. 10, as the casting. v The intermediate plate 4 is of just the thickness of the skeleton. match plate 7, Fig. 7 and'is provided with registering means such as holes 8, 8 to cotiperate with the pins 9 and '10 carried by the portion 2 of the metal mold. These pins extend throughthe intermediate plate 4 and into the coiiperating holes in the metal portion 3 of the mold. r

In pouring the metal at the point 11, Fig.

1, it will flow into the metal mold 1 and will form a metal panel 12, which will be the exact size of the opening 13 in the intermediate plate 4 and of the same thickness. On each side of the panel 12 will be formed complementary parts-of the completed article to be cast, whichin the example shown will make each side of the panel 12 be provided with a half cylinder 14. The metal mold is then opened, the intermediate plate 4 of the mold withdrawn and the panel 12 removed from the intermediate plate 4:.

-Any -number of panels 12 may be made by the same master mold 1.

' These panels 12 are then inserted in openings 15, 15 in the skeleton match plate 7, the openings being of such size that th' panels are held firmly therein, preferably by friction, though any other means may be used if desired. Of course the match plate may use either one panel 12 or any suitable number that may be desired. 1 have shown the match plate 7 provided with two pairs of panels, making four rows of panels in all.

The skeleton match plate 7 is provided with handles 16, 16 so that it may be readily placed on the mold 17 to make the required impressions in themolding sand 18. When it has also beenused to make the desired impressions in the cope 19, it is removed, and the cope l9 placed on the top of the mold 17 to form the foundry flask 20 shown in Fig. 9. The metal is poured in the usual openings 21, 21 each opening serving for two rows of castings.

It will be noted that by having my metal pattern integral with the metal panels insures absolute accuracy of alinement and of thickness of the metal plate throughout. This is of great importance for if the slightest flaw occurs it makes an imperfect fit between the cope and the mold so that fins and other deformities will result in the casting, which will either require them to be machined or scrapped.

It is clear,-as previously noted, that if one .or more of the panels 12, with its integral pattern 14, becomes marred or broken in any manner, due to the rough handling that they receive in the foundry, it is merely necessary to lmock out the damaged panel 12 and insert a new one, a few surplus ones being usually supplied to the foundry for this purpose.

Having thus described this invention in connection with the illustrative embodiments thereof, to the details of which I do not desire to be limited, what is claimed as new and what is desired to secure by Letters Patent is set forth in the appended claims:

1. The method of making a match plate consisting in separating the parts of a metal mold a sufiicient distance to form a panel pouring the metal into the separated metal mold and preventing it escapin from the separated metal mold, thereby orming in said metal mold an integral pattern and panel.

2. The method of making a match plate consisting in separating the parts of a metal mold a suliicient distance to form a panel of the same thickness as a skeleton match plate, pouring the metal into the separated metal mold and preventing it escaping from the separated metal mold, thereby forming in said metal mold an integral pattern and panel, and inserting said integral pattern and panel in a skeleton match plate.

3. The method of making a match plate consisting in first constructing a metal mold the halves of which when placed together will exactly reproduce the desired casting in sharp and exact outline without any further machine or finishing work, separating the halves of the metal mold a distance suflicient to form a panel of a desired thickness corresponding to the thickness of a metal p rte in which the panel is to be mounted, pouring the metal to form the pattern and panel and preventing waste of the metalbetween the separated parts of the metal mold, thereby forming one half of the desired finished impression on opposite sides of said panel, and inserting one or more of said integral patterns and panels in a-skeleton match late.

HEN Y W. PLEISTER.

Witnesses:

MARY R. RYAN, A. M. WILLIAMS. 

